Portland cement clinker microstructure

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• Portland cement clinker microstructure
• C3S, C2S, C3A, C4AF

200 micron
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Course admin

• 18 h lectures
• Course text
• CALLISTER
• MATERIALS SCIENCE AND ENGINEERING
• 5TH EDN, WILEY, 2000
• Selected chapters 1-16, 18, 20
• Tutorials from Week 5
• Tutorial problems from Week 4
• Supplementary material on web
• Feedback etc christopher.hall_at_ed.ac.uk
• vicky.pugsley_at_ed.ac.uk

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Course admin website
You will find course documents at www.cmse.ed.ac.
uk/MSE3/mse3.html
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• Summary
• To provide a broad introduction to the materials
  used in engineering,
• their properties and structures
• Module objectives On completing the module,
  students should
• Be familiar with
• the major classes of engineering materials
• the mechanical, thermal and chemical properties
  of engineering materials,
• their definition, measurement and specification
• Be able to locate material property data
• Understand in qualitative terms the physical
  basis of material structure
• of the principal engineering properties of
  materials
• Be familiar with
• elementary concepts of ferrous metallurgy
• the concepts of electrochemical corrosion
• the major polymeric materials and their use as
  solid polymers, coatings,
• foams and adhesives
• the main types of ceramics, cements and glasses
  used in engineering

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Thermal properties cluster

• Thermal expansivity ?
• Thermal conductivity ?
• Specific heat capacity c
• Melting temperature Tm
• others??
• CALLISTER Ch 20 5th edn

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(No Transcript)
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Quiz 19 Jan 09

• What is the melting temperature of iron?

8
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C

9
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  

10
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3

11
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  

12
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3

13
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the density of air?
  

14
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the density of air?
  1.2 kg/m3

15
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the thermal expansivity of brass? 20
  ? 10-6 K-1
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the density of air?
  1.2 kg/m3
• What is the Youngs modulus of steel?
  

16
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the thermal expansivity of brass? 20
  ? 10-6 K-1
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the Youngs modulus of steel?
  200 GPa

17
Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the density of air?
  1.2 kg/m3
• What is the Youngs modulus of steel?
  200 GPa
• What is the thermal expansivity of brass?

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Quiz 10 Jan 08

• What is the melting temperature of iron?
  1540 C
• What is the density of iron?
  7 900 kg/m3
• What is the density of gold?
  19 300 kg/m3
• What is the density of air?
  1.2 kg/m3
• What is the Youngs modulus of steel?
  200 GPa
• What is the thermal expansivity of brass? 20
  ? 10-6 K-1

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Iron density
20
Iron density
bcc
912 C
fcc
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Explosive spalling in concrete under fire
conditions

• Quartz...
• Major constituent of granite, quartzite and other
  mineral aggregates used in concrete
• Alpha-beta quartz transition
• Displacive structural transition
• 573 C
• 2 INCREASE in volume

? ?
See Tucker, Keen and Dove, Min Mag 2001, 65,
489-507
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Invars

• Iron-nickel alloys with exceptionally
• low thermal expansivity
• ? about 0.4 ? 10-6 / K

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Quiz 6 Feb 04

• What is the effect of porosity on
• thermal expansivity?
• density?
• thermal conductivity?
• elastic modulus?
• strength?

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Quiz 6 Feb 04
As
Ap

• What is the effect of porosity on
• thermal expansivity?
• density?
• thermal conductivity?
• elastic modulus?
• strength?

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• Density
• Define volume fraction porosity f
• f Volume voids/Total volume
• Bulk density
• ?b ?s(1 - f )
• where ?s is solid density

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• Density
• Density relation is a simple example of
• the Law of Mixtures for material properties
• Composite material A, B
• with volume fractions fA, fB
• Xcom fAXA fBXB

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Quiz 6 Feb 04
As
Ap

• What is the effect of porosity on thermal
  expansivity?
• How does ? vary with f ?
• ? is independent of f

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Thermal conductivity

• Defining equation
• q ? ? dT?dx
• where q is the heat flux
• Units w ?(m K)
• Typical values and range
• 1000 --- 0.01 w ?(mK)
• See for example Ashby charts

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Thermal conductivity

• Correlations with other properties
• speed of sound
• elastic modulus

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Thermal conductivity

• Correlations with other properties
• For metals
• electrical conductivity
• Wiedemann-Franz law
• ratio of electrical to thermal conductivity
• is the same for all metals
• at a given temperature